Police officer Shaukat Ali says two gunmen riding a motorcycle shot cardiologist Mehdi Ali Qamar 10 times at close range Monday, killing him in front of his wife and son, who were not harmed. The three were leaving a cemetery after praying at the graves of relatives in the central town of Chanab Nagar.

The officer said the family arrived two days ago from the U.S. for a weeklong visit and the cardiologist was to see patients at a local hospital. He said the killers' motive is not yet known.

Ahmadis follow the self-proclaimed prophet Ghulam Ahmad and consider themselves Muslims, but are forbidden from presenting themselves as such by Pakistani law.